What is the optimum water content in compaction?

Allowable range for the optimum water content for compaction was 11.5\% – 20.5\%. This range results in 95\% or greater maximum dry unit weight.

What is compaction percentage?

[pər′sent kəm′pak·shən] (engineering) The ratio, expressed as a percentage, of dry unit weight of a soil to maximum unit weight obtained in a laboratory compaction test.

How do you calculate the degree of soil saturation?

The degree of saturation is the ratio of the volume of water in a soil to the volume of voids. The degree of saturation is thus a ratio which can be between 0 and 1. It can also be expressed as a percent. It is the percentage of the void space which is filled with water.

How do you tell if soil is properly compacted?

A few of the most common signs of compacted soil are:

1. Your grass stops growing in summer.
2. Water puddles form in low areas of your lawn.
3. Water runs quickly away from high areas of your lawn.
4. Thin, patchy areas of grass.
5. Heavy clay soil.
6. Insertion of a screwdriver into the soil is difficult.

What happens if the soil is not compacted at optimum moisture content?

Poor Compaction- When the soil is not at or close to optimum moisture, the soil’s maximum density is greatly impacted. When the soil is too dry, the soil is not lubricated enough to fill all of the voids in the soil needed to create an extremely dense surface.

What is the degree of saturation at optimum moisture content?

At constant moisture content, the dry unit weight reaches its theoretical maximum when all the air is expelled from the void spaces, i.e. when degree of saturation is 100\%.

How do you calculate soil compaction percentage?

3.7 Calculate percent relative compaction by dividing the dry density of the material from the test site by that material’s moisture density relation curve’s maximum dry density, and multiply by 100\%.

What is soil compaction percentage?

Compaction is accomplished by applying a force or vibration to the soil mass. For example, specifications often require compaction to be 95 percent of Standard Proctor. This means the on-site soil density must be equal to 95\% of the maximum achievable compaction.

How do you measure air content in soil?

Percentage of air voids in the soil is obtained by dividing the volume of air to the total volume. This is expressed in percentage. When the soil is fully saturated, the percentage of air voids is equal to zero.

What is saturation soil?

Saturation – refers to a soil’s water content when practically all pore spaces are filled with water. This is a temporary state for well-drained soils, as the excess water quickly drains out of the larger pores under the influence of gravity, to be replaced by air.

How can you tell if soil is saturated?

If all soil pores are filled with water the soil is said to be saturated. There is no air left in the soil (see Fig. 37a).